Fuel-feeding system



April 9; 1929. n J. v` GIESLER 1,708,399

FVUEL FEEDING SYSTEM Filed July le. 1920 y 4 Sne'etsheet l April 9,1929.

Filed July 16. 192C J. V. GIESLER FUEL FEEDING SYSTEM 4 Sheets-Sheet 2Z1 l l l Z4 15 VT4 56 '70 I4- 73 9 8 7 .z5 l5.5

Si (ulg/L @I1/Wenko:

April 9, 1929, J v GIESLER 1,798,306

FUEL FEEDING SYSTEM Filed July 16, 1920 4 sheets-sneer 5 IL! yl .IIS

April 9, 1929. J. V. GIESLER 1,708,306

' FUEL FEEDING SYSTEM Filed July 1e. 192C 4 sheets-Sheet 4 GRM/"utaPatented Apr. 9, 1929.

UNITED STATES JEAN V. GIESLER, OF KNOXVILLE, TENNESSEE, ASSIGNOR, BYMESNE ASSIGNMENTS,

PATENT OFFICE.

TO THE FULTON SYLPHON COMPANY, OF KNOXVILLE, TENNESSEE, A CORPORATION 0FDELAWARE.

FUEL-FEEDING SYSTEM.

Application filed July 16,

This invention relates to fuel-feeding sy"- tems for engines and, moreparticularly, to means for pumping the fuel from the source of fuel tothe fuel-consuming elements of the engine. It is also an object of thisinvention to provide an improved pump which, while capable of a widevariety of uses, has special utility when applied to the pumping of fuelto an engine.

It is an object of this invent-ion to provide an improved fuel-feedingsystem for engines comprising a pump the stroke of which variesautomatically with the fuel consumption so as to maintain apredetermined pressure on the fuel supply to said engine.

A further object of this invention is to provide an improvedfuel-feeding system for engines which comprises a pump that is soconstructed as to automatically absorb the 2") shock arising from theinertia of the fuel.

A further object of this .invention is to provide -a fuel-feeding systemincluding an improved pump which has a flexible pumping member andactuating means therefor which is so related to said flexible pumpingmember that the stroke of the latter automatically varies with thepressure developed thereby so that the quantity of fuel supplied by saidpump automatically conforms with the rate of consumption of fuel by theengine.

A furthir object of this invention is to provide a fuel-feeding systemincluding an impri'ived pump having a flexible pumping member andactuating means therefor which is so related to said member that saidmember may move with respect to said actuating means in response to anincrease of pressure so as to absorb the shock arising from the inertiaof the fuel.

Another object of this invention is to provide an improved pump having astroke which varies antoniatically with the pres- ,l sure developedthereby; also an improved i pump the pumping member of whiclrmay movewith respect to its actuating means in response to an increase ofpressure in the pump.

Yet another object of the present invention is to provide a fuel-feedingsystem of the type heretofore characterized with means whereby thesupply of fuel to the fuel-consuming elements is made substantiallycontinuous. y Another object is to pro- 1920. Serial No. 396,783.

vide a fuel-feeding system of the type here tofore characterized whereinthe inlet and outlet valves are so arranged with respect to the pump'that the fuel cannot flow out of. the pump when the latter is not inoperation.

Other objects relate to the provision of a fuel-feeding system which iscomposed of a relatively few parts which may be inexpcnsivelymanufactured and easily installed; which is relatively compact and canbe positioned at any convenient location with respect to the engine;which will supply fuel to the engine soon as and long as the engine isin operation; and which is highly efiicient in operation.

In the preferred embodiment of the invention thepumping member is aflexible member in the form of an cxpansible and collapsible wall, andsaid actuating means is so related to said flexible member as topositively actua-te the same during the suction stroke, said membermaking its pressure stroke by the force of resiliency which may beinherent in said flexible member or provided by resilient means actingon said member or both. Said flexible member, although positivelyactuated during the suction stroke, is preferably so related to theactuating means that it may move with respect thereto in response to anincrease of pressure arising from the inertia of the fuel. The inventionalso comprises the improved pump used in other relations than in a fuelfeeding system.

The invention is capable of receiving a variety of mechanicalexpressions some of which are shown on the accompanying` drawings, butit is to be expressly understood that the drawings are for the purposeof illustration only and are not to be construed as a definition of thelimits of the invention. reference being had to the apn pended claimsfor that purpose.

Referring in detail to said drawings, wherein the same charactersdesignate corresponding parts iii the several figures :n

Fig. l is a schematic elevation of a fuelfeeding system for an internalcombustion engine embodying the present invent-ion;

F ig. 2 is an axial section of a pump embodying the present invention;

Fig. 3 is an axial section of another pump embodying the presentinvention; and

Fig'. 4 is en axial seetion of a pump embodying; the present inventionund provided wilh ineens for effecting e continuous discharge to thefuel-consuming elements,

In the form. showmilre invention, is` up plied to e fuel-feeding systemfor un internal' combustion engine of the type commonly employed inautomobiles wherein the engine 1 provided with Jdie usuel intakemunifold 2 :uid e eurbureter 3 oiienysuibzrhle oonsrrueion. it is to beexpressly understood, however, that 4he invention is not limited tio thesuliplyiugir ofli fuel lo u. carburetor, es any other suitable:fuel-consuming device or elements, es fue-l burners, may be employed ineoinjuneliion with the pr sen;` invention.. A source of 'fuel iediugrununeiically illusr unillzed uit f1', the same communicating "uough pipe 5; with. fr pump, generally designated (5i/Y the llutlierinturn. cominummering willi the (,tmrbiu'eter 3 through. pipe Z1 Imiaccordance with the present invention the mmap 6 has as. its pumpingmember ai liexljble wall so related lo, actuating; ineehenieni 'thatJdie amount oli flexure osaid well` and ite position with, respect tosaid actuating mechanism varies mitonmiiieelly with the preseur in hepump. in the iiorm slhowii on, the drawings. on expansiblse andcollups'ble tugbulur wall' 8, preferably oi'f corrugated resilientmaterial?, such. als metal, is suitably mounfaed' u" ein epiunp chembeif9 provided; within e, easing 10i of any suiieble consi;rueifioir.ABrezed or otherwise Suite-bly attached to one end of the tubularerpensible :md collapsible wall 8D is zi rigid movable end well 11,while the opposite end! of said; well; 8 is held lixedly in posit-ion,as by brezedf orotherwise suieubly attached to :i rigidy :mnulus 12,vwhich only be clamped iii position between the pump e sini@ 10J und thegeur housing; 13 herein- :ifffxer referred io.

Gperulivel-y connected iio said movable end wall 11 is actuatingi-iieuuys oli' suit' ble roizsii'ufi'iou l'or reciprocating seid movableend wall. Suid zwiluzilin-g means prefeiubly :5o imisl'i'uciml ur: loposiiively move Suid inefable oud well in eue direi/hon buil to permitiuoveuwut of seid well with respect lo Huid :l-fiuuliug; menus shouldthe presuue ou lhe fluid side ofl ,said well eX- ieed the operating'vpressure of ihe eeiuziling miens, In` ibo 'lfoi'm :4l-)own iu Figi'. aiU-rlhuiwd yoke 1J: provideffl wiil, :i spindle 15 extending from one ofthe leggi; of said Uli und seid spindle is opernivelyconnected lo saidmovable end wall 11 es by the threaded connection indicated et 16. Toreciprocate seid yoke e eem 17, shown as :un eccenirie, isL mountedbetween the legs of the Ul in position to engage one of said legs anddisplace the yoke in one direction es said eumor eeeentrie 17 rotates,the legs 'of Said yoke 14 being, Preferably so spaced That lhe cuni oreccentric 17 does not e11- guapge he opposite leg thereozli. In theprelierred embodiment oi? the invention seid com or eeeentrio is sorelated jeo said yoke es. io, engage the leg 18 to: lle): the wall. 8 insuch e. direction. as provides e, suction sirolle, i'. e. to collapseseid wall 8 in the :u'ifeugren'ieut shown on the drawings; leg;` 19 oiseid yoke, however, is so spaced :from leg 1.8 Lhereoi that when the 17is rotated through 1800 from the position shown in Fig. 2' ifs does noi1eoniues and f-lfiereore does not positively operaie lil-ie Seid legV 19to provide 'the preesuif'e stroke of" ihe flexible wzl-ll.

The pi'esf-1iiie sirol'e of the if# Zible well- 8 is preferablyelleciled by the force oi'i resiliency. This resilier-icy nie-y beinherent in the welll itself es when seid Well is oonsiii-rueied of res#t muterizil, or il; mary be supplied by ref lient means eoing on ihemovable end well' 11, or the combined resilieney 01": the 'iexible.velli endv oii a. spring on the' movable end Wall: 11 may be emp eyed.In 'lne Yliorin shown n, Coil Spring 2O of suitable strengbli toproperly supe pleurene the resil'ieneyl of the expensible sindeoliljepsible wellv S: is mounted v'ihin seid will in operui e engrreineneli i opposite @nos wi'h the movulfile end wzill 11 and n, ixedabutment well 21. Seid movable end willi' 11 and Jche abutment well 21may bel desirebly so eonsrueted is to center seid springe; es; Shown.Seid abutment welll 21 may also be provided iviih e proieeeion or bossprojecing within the iubuler well 8. to such i position that it mrycontado vvi'ah the momble end well 11 a, projeeion thereon and JLluisprevent 'l'lexure or collapse of Suid well S. il` 1d projection or bossmuy also be ,vided with :in annuler plug or Coller 22 o guide thereeiproeuiing inovomer' spindle 14"). rovuledl for J. l, s oi ho i Airysuiuole meri-iis may be i io'rzi i'ho ein or ereeniifie 1i. in, lrho:Form shown. in Fig. 0 su'd Cum or eeeiiirie is nnuiuird on u if vvhuhCurries :i pini( iriin iur-sh wih u pinion S6 on 29u/ vul-rich in turn,Curries e rhuiu geur 2S driven by u chum Q9 'from u @bein grem- 30 ou u,shzlii 31, 'if-'he lzri'ier i f prix, im, Yfb Y i' i i Y su hier. einen.mobi liu, (Muu-x :luiluoi beu :mme oher roliuiiug engine-driven The mimor eccentric 17 :md d if und 2G re prelierzihly ruounied wihiu e geurhousing 123 oi :my rsuiluble eonsrriuz'' ou, iyhe seme bein/sfsliown ascramped to he pump oasiiw C by bolts or sermvs 32. Seid geni' lmusinte`13 may be mede oil-tight and wholly or purly lilled with e lubricant toeffect rhe proper lubri, Cei-ion of ihe actuating mechanism enclosedwithin seid ezisie. 1i? desire l.f the yoke 1li may be prev lied fromroei'ing a geueruily U-sheped projeeiion provided in 'um or eeeenrriolll) lll)

the interior oit the gear housing 13. In the form shown in Fig. 2, abolt has provided on its head a pair of spaced lugs Se between which theyoke 14 reciprocates, said bolt 33 being retained in operative positionby a nut 85 threaded on its projecting exterior' end.

To supply means for manually flexing the wall 8 so as to enable tbe pumpto be primed when tbe system is tirst put into operation, the yoke lllis preferably inrovided with a spindle 36 projecting to the exterior ofthe teje-ar housing' 13 Wliere it may be conveniently operated by hand.ln the form sin vn in Fig'. 2, said spindle SG is sliovfn in alinementwith the spindle l and is provided eitoriorly of the housing lll vwith asuitable llznob or handg'rasp 3T. `Plaid manual means for 'flexing' thepumping; inenilier 8 may be extended to any convenient location, to tbedash` but as said manna. means will normally be operated only when thefuel-feeding system is first installed, the spindle 36 with itshand-grasp 3T need ,only project Within the engine hood.

Said pump is also provided with suitable inlet and outlet valvemechanism. ln the form shown in Fig. 2 the pump easing;v l0 is providedat the upper portion thereof with a threaded nipple 38 which receives avalve housing provided at its opposite ends vitli passages l() and 4lfor connection with the pipes 5 and l respectively. Passage 40terminates in a valve seat 42 controlled by a valve member 43, and a 44extending from the inlet valve 42, 48 `communicates with the nipple 33intermediate its length and terminates at its opposite end in a valveseatl') controlled by a valve member 4G. The passage all communicateswith the opposite side o't said ontlet valve 45, 41:6. rthe valven'iembers -ll and lo may be ot any suitable construction, beinc` shownas of the disk type, and may be guided in their movements in :invsuitable ivay, the respective bonnets ll-"i' and il?) bong shown asprovided with recesses lli-fl to Lguide tlie movement ot tbe valvespindles inlaid valve dislfs are shown as moved into closed position by`rravity and the u erating` pressures, but may be spring;` actuated itdesired.'

The valve mechanism heretoibre described is preferably located above thepump casing' l0 so that when the pump is not in operation there will beno tendency tor tbe liquid within said casing l0 to tloiv out oi' thesame even though the valves may be leaky. The passages through tlievalve housing 39 are preferably so arranged that the inerte ot the oilflowing into the same will to carry the oil through tbe outlet valve andinto the pipe communieating` vvitli the passage ll. The passages throughthe valve housing 39 are also preferably so constructed as to allorosubstantially no air pockets in order to iacilitate tbe evacuation oi'air out owing to me relative anew said valves, this type ot constructiondoes ig' the e' when not possess tbe advantage of proven ovttloiv oitfluid trom the pump casi-in t-lie pump is not in operation, should tlievalve leal?. By arrangringjr said inlet and outlet valves diametrieallyopposite, boivever, this construction possesses the advantao l, liercibefore s'e'terred to in connection vvitu the embodiment oli Fie'. f2,that the inertia ot the fluid ow'rig into the pump j t nds' to carry ittluougrh the outlet rlbe pumping member of the embodiinent oi; ltie'. lis ot sulistaiiciallj the same construction as that heretofore describedin conjunction with tbe embodiment ot lf Q, but the abutment wall il forthe spring* Q() is not extended to 1provide a stop for the movable endivall ll. The actuating mechanism for tlie pumping` member shown inVEig. S is of' somewhat (litter-ent construction .trom that shown in tbevol-:e being` o't generally rectangular construction and being prov `redwith an extension 56, shown as in alinement with the spindle l5,received within a. recess 57 provided in an enlargement oit tbe coveroit tbe (rear housing' lf3. Said projection fill, reciprocating' in therecess 57, co-acts with tb spindle l5, reciprocating in an. aperture intbe abutment Wall Si, to guide the reciprocatimi ot tlie yolre.. Theeiilargreinent on the cover 5S may be provided with spaced projectionsto also preventJ said yolre from rotating'. this embodiment. tbe shui 2lot tbe cam or eccentric li' carri-es an'orin whee 59 with whit-li meshesa norm C() on a sluiit. (il

proiectimr to the ezd'ei'ior ot the housing; i where is slioivn ascarrying' a chain iii) vbe subszrutiully continuo puuu) to theil'uel-eopuimi up; elements shrill p and not intermitbent with thepressure strokes of Jthe `ipiueinemlur7 s ceiver preferublj interiV inthe system between the pump and the fuel consuming' elements. Thisreceiver muy be of :my suitul'ile eoustfiguction un oir receiver or :Lreeeiver employing` u loaded ifopliregu1. lu, the embodiment illustratedin Fig. -if :i receiver casing (if is shown es provid d with opposednipples G53 und for conn ion with the 'vulve heusing: 52) und. the pip-e7 respectively. Mounted within the sind rr, ,eiyer easing en espoirsible und collapsible Wall- T,O,prei`;erubly of (':orrugguted resilientmaterial such :is met-el, one end ot seid Woll being; held fixedly inposition by being: bref/ed or otherwisesuitzrbly u ,ached to o riggioonuulus 7l secured to or formed :is o part olf the receiver ces ing' G7,und the opina it euri ot z ,ld weil i0 being;` brozed or otherwisesuitably ritter `red to zr rigid movable end` woll 72. The re silieneyof said woll 70 mary be relied upon to nuriutein on outflow pressure onthe fluid in. the system, or the resiliency oi seid d muy be substitutedby or supplemeiued by o coil spring 73 engaging; the movable. end Well72 :it one end :rnd in eux@ rgemen; with an abutment disk Tl et itsother To provide for the adjust-1 1' ent oit the pressure of thereceiver diaphragm on the riuid lorvi through seid reeeiier seidabutment disk a-l muy be operatively engaged by n threueec bolt 75 whichprojects to the exterior the cover 7G of the receiver easing 67, Whereit muy be rotated to increase or decreese the tension of the spring 73,.

perzitien: Assume that the fuel-feeding system has been pro perlyinstalled, thev pump beine' loezfrted et :my convenient position Withinthe engine hood :rnd connected by pipe 5 with ihe 'fuel tuuh Ll, :it :mydesired locution, and by the pipe i wird the cirrbureer 3. rlhezni'tuiitiniij inecl-:uiism of the pump may be connected with anysuite-bie driven port of the engine ''lirough georim; oi zmy suitableconstruction g it the crunk shaft employed' :is the pui Ap-rivingclement, 'its speed oiE rotation will ordinarily be in excess oi ibutrequired for the proper operation of the pump und. there/i' re, theueluiuing meeh- :iuism ilior the pump should iufeiierubly includereducing peering, oi which the chain geurmg; illustrated muy be teken ustypicul.

system is iirst ins und the wmmunicu priinipg tibo pump. Vhiile seidimmuni, prin'iing means muy extend to the dash or other suitablelocution, if the type. of COD- structien shown Fig. 2; is enrplpyed so t.et @iter the pump Casing isprimel it con: not become emptied While the,engine s standing idle, the manuel priming. ULG/Chojnism ispreiferzrblyinode accessible under the engine hood; it need; be operated; but once.By graspingrY the member. S, in the embodiment ofi Fifi. 2, und flexingthe Woll 8 u few times7 the :rir may be evacuated from the system andthe pump cursing' endl; communicating pipes und pussiges filled with.the fuel.

Thereafter, Whenever the engine is turning;` over7 the com or eccentric17 is rotfrted end :it euch ro` rigrl hond les` o., yoke ll or to moreJhe sume toward. the right es viewed on the drawings. T hereeiproeeition oi the yoke tourrrd the right cruises the movuble endWell ll to also move toi the right, flexing.. or collapsing; theexpunsible und collapsible Woll 8 :15nd providing fr suctiony stroke.The suetion in the pump 1 0 eexuses the valve #i3 to open und Atiuid to.flow into seid costrom the pipe lflrsthe com oreccentrio i es past tl epos'i'ion shown on the drevings thev movable, end Well' ll mores towardthe left is viewed on the drawings by the force of resiliency inherentin the expunsible and collapsible Weill 8 or the spring- 20 or both toprovide o pressure streifte, the yole i8 following* the ieee of the camor. ececntric es it i'otutes'but not being positively :rctuoted thereby.The pressure thus developed in the pump casing opens the, oui]- letvalve 4G und the fuel is forced through the pipe 7 'lo the carburetor.

llfhen the flexible pumping' member makes this suction stroke and thevulve l5 is opened, u relatively large muss of iuel ending buck through'the pipe 5 toy the trink 4l is set in motion,V and this relativelylarge mess of fuel possesses considerable inertie. lli the iretuzrting.meehonismy were positively connected to the movable end well ll so thotjsuid Woll were brought tol un abrupt stop at ihe end of the stroke, theinertie olI the iniioujing fuel would build up ir relatively hi ghinstantsueous pressure within the pump casing und this reluively highpressure et euch operation olI the pumpiire` member would tend tooverstress the flexible iyull 8 :1nd cause its early exlurusion andrupfvure. By having the actuating mechanism so related to the morubleend Wall 1l that the lutter muy more with respect thereto7 however, thebuilding; up of high instuntsneous pressures Within the pump easingA ispre- Ven'letb es the tenden :},f oi the inertie oji'f the oil to buildup e pressure Within the pump casing et the end of the suction strokesimply causes the movable end Wall ll to more further toward the right,las Viewed en the the drawings, against the resiliency inherent in theflexible wall 8 orl the spring 2O or both, the yoke moving away from thecam or eccentric 17, until the shock of the inertia of the fuel isabsorbed by the force of resiliency.

As long as the carburetor or other fueleonsuming elements are using fuelas fast as the same is pumped from the casing l() the movable end wall1l will make its full stroke in each direction. If the pump tends tosupply fuel to the fuel-consuming elements more rapidly than it is usedthereby, however, a pressure is built up in the system between said pumpand the fuel-consuming elements and this pressure balances the force ofresiliency which tends to move the movable end wall toward the left, asviewed on the drawings, at some point in the stroke of said wall. Thelength of the pressure stroke of the pumping member is thereforediminished to conform with the rate of consumption of the fuel. As thecam or eccentric rotates it again picks up the yoke to move it towardthe right, but the return or pressure strek-e of the pumping member isalways conditioned by the pressure within the 1pump casing so that thelength of said stroke varies automatically with the variations ofpressure. rl`hereby the pumping member automatically maintains apredetermined pressure within the pump easing and the system leading tothe fuel-consuming'elements and can never exceed said. pressure.

lVhen the engine is stopped the pump is also stopped, but if the valvemechanism be arranged as shown in the embodiment of Fig. 2, the fuelcannot drain out of the pump casing or be siphoned out in the event ofleaky valves. rllherefore, the pump casing remains primed for the nextoperation of the pump and the latter' is ready to supply fuel to theengine as promptly as the engine is started.. Moreover, with thearrangement of valves shown, the inertia of the oil llo wing to the pumptends to carry the same through the outlet valve so to increase theetliciency of the pump and reduce the tendency to build up highinstantaneous pressures in the pump casing. `When a receiver is providedbetween the pump and the fuel-consuming elements the supply of fuel tothe latter is rendered.

substantially continuous notwithstanding the interniittent pressurestrokes of the pumping member, the oil flowing from the pump during thepressure stroke building up a pressure in the receiver against theresiliency inherent in the wall 70 er the spring 73 er beth, and duringthe suction stroke of the pumping member said wall 70 expanding tocontinue the supply to the fuel-consuming elements. It is to be expresslunderstood, however, that the provision o a receiver is not essentialt-o the present invention since, by so designing the pump that it tendsto supply fuel in excess of the rate of consumption thereof so that apressure is always maintained on the fuel in the system between saidpump and the fuel-consuming elements, said pressure tends to maintain acontinuous supply to said elements whereby a receiver becomesunnecessary.

t will therefore be perceived that a fuelfceding system has beenprovided wherein 'the pump has a stroke which varies automatically withthe consumption of fuel and wherein the pump is so constructed as toabsorb the pressures which the inertia of the fuel tends to build uptherein. Therefore the provision of devices to prevent the building upof excessive pressures in the system and to by-pastt` excess fuel backto the source becomes unnecessary. Furthermore, the construction of thepump so that excess pressures are not built up therein preventsoverstress of the flexible member, insures its long life, and renderspracticable the use of the same as a pumping member.

Again, it will be perceived that a fuel- :feedin system has beenprovided which insures a substantially continuous supply of fuel to thefuel-consuming elements and one which. in the preferred embodiment,insures that the pump casing shall not be drained when the engine isstanding idle. Again, it will be perceived that a fuel-feeding systemhas been provided which is applicable to a wide variety of engines andthe pump of which can be positioned at any convenient location withrespect thereto. Furthermore, the fuel-feeding system provided does notrequire any particular location of the fuel tank nor of the carbureteror other fuelconsuming elements; it is compact so that it may beconveniently located under the usual engine hood; it can be readilyadapted to any engine speed and is simple to install; it is composed ofa relatively few parts that are inexpensive to manufacture and assemble;and it is highly efficient in operation.

lllhile the embodiments shown on the drawings have been described withconirable particularity it is to be expressly 'understood that theinvention is notrestricted thereto the same is capable of receiving avariety of mechanical expressions some of which will readily suggestthemselves to those skilled in the art while certain parts can be usedwithout other parts thereof. While the pump is shown as applied to thefeeding of fuel it is to be eX- pressly understood that the invention isnot limited to such use of the pump as it embraces the improved pumpapplied to other uses; while the preferred embodiment of the inventionemploys a flexible pumping member, the invention in some of its broaderaspects is not limited thereto as other resiliently actuated members maybe employed to secure some of the novel results accomplished by thepresent invention. Changes

